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80cbaadfaf
Renamed cmake/riscv64-gcc-rv32imc.cmake to the accurate name cmake/riscv32-unknown-elf-rv32imc.cmake and switch the compiler from riscv64-unknown-elf-gcc to riscv32-unknown-elf-gcc. The riscv-collab riscv64-elf toolchain has no rv32 multilib and will fail to link soft-float and integer helpers (__clzsi2, __muldf3, etc.) when building for -march=rv32imc_zicsr -mabi=ilp32. The dedicated riscv32-unknown-elf-gcc (riscv-collab riscv32-elf release, installed to /opt/riscv by scripts/install_riscv.sh) ships the correct native rv32/ilp32 libgcc — analogous to arm-none-eabi-gcc for Cortex-M. The old filename is kept as a two-line compatibility alias that includes the new file, so any out-of-tree users who hardcode the old path still work. Also update: - core_v_mcu/build.sh: reference new cmake filename - core_v_mcu/README.md: update prerequisites table and toolchain docs Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>